ABSTRACT
We show that a New Keynesian model incorporating inventory dynamics can generate a hump-shaped response of macro-variables to shocks even without habit formation. The impulse responses from the calibrated model show that, in the absence of habit formation, the macro-variables, including output and consumption gaps and the real wage, display a gradual hump-shaped response to monetary policy shocks. We calibrate seven other variants of the model without habit formation. We find that the results still hold in a flexible price model, while the presence of inventories drives the persistence of the macro-variables. Besides, the model replicates most of the empirical business cycle regularities of inventories and the inventory–sales ratio in the data.
Disclosure statement
No potential conflict of interest was reported by the author(s).